This request requires us to perform dimensional analysis which we have no plans to do. Having said that, in recent releases we have progressively added features to improve the user experience. For example, if all the inputs to the analysis have UOM from the same class, we interpret that to mean the output should be in the same UOM class. In this instance, AF would perform UOM class conversion if the output attribute had previously been configured with an UOM from the same class as in the inputs.